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Alternator intermittent no charge

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Old Jan 7, 2012 | 03:40 PM
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Default Alternator intermittent no charge

Is my alternator going out? Very unusual problem. Sometimes when I start my 99 Z28 the alternator is not charging. It only seems to do it on colder mornings, say below 50 degrees F (Florida car). On warmer days, I start it up and it's fine all day, no matter how many times I drive it during the day. The voltage never drops while I am driving.
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Old Jan 8, 2012 | 12:20 PM
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Just started the car this morning and it was about 65 degrees. The alternator was not charging. I took the alternator off and took it to Autozone to have it tested. It tested good. I guess I'll check for a broken exciter wire.
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Old Jan 8, 2012 | 03:35 PM
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Found it! Broken exciter wire. The wires were broken right at the connector. There was just enough sticking out of the back of the connector that I was able to splice and solder it back together. I guess the wires would grow just enough from thermal expansion to make a connection when it warmed up. Now I wonder how long it'll take before vibration cracks the solder and I have to do it all over again!
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Old Jan 10, 2012 | 12:32 AM
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Originally Posted by bb5401000
Found it! Broken exciter wire. The wires were broken right at the connector. There was just enough sticking out of the back of the connector that I was able to splice and solder it back together. I guess the wires would grow just enough from thermal expansion to make a connection when it warmed up. Now I wonder how long it'll take before vibration cracks the solder and I have to do it all over again!
Not uncommon for them to fail, I replaced mine and clipped the 3 unused wires.

http://www.amazon.com/ACDelco-PT1136.../dp/B000C9QDR8


If you have some time, read through this, sounds like your problem is fixed but you might find this interesting as well.

https://ls1tech.com/forums/generatio...-failures.html
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Old Jan 10, 2012 | 03:09 AM
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i got a new wire from ebay......had the correct 1 wire in it for f bods
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Old Jan 10, 2012 | 03:22 AM
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I just fixed mine today. I had some extra HID wiring, slid one end into the connector and used a connector off the HID kit to join the two wires. So far so good
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